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v3.22.1

Securities - Amortized cost and fair value for available for sale securities (Details) - USD ($) $ in Thousands | 3 Months Ended |
--- | --- | ---
Mar. 31, 2022 | Mar. 31, 2021 | Dec. 31, 2021
investment securities held-to-maturity |  |  |
Amortized cost | $ 2,827,769 |  | $ 1,819,901
Gross Unrealized Gains | 108 |  | 318
Gross Unrealized Losses | (197,382) |  | (42,155)
Fair Value | 2,630,495 |  | 1,778,064
Investment securities available for sale |  |  |
Amortized cost | 6,314,143 |  | 5,221,296
Gross Unrealized Gains | 2,985 |  | 35,980
Gross Unrealized Losses | (392,922) |  | (63,798)
Fair Value | 5,924,206 |  | 5,193,478
Realized gains or losses | 0 | $ 0 |
Atlantic Capital |  |  |
Investment securities available for sale |  |  |
Sold securities | 414,400 |  |
Realized gains or losses | 0 |  |
U.S. Treasuries |  |  |
Investment securities available for sale |  |  |
Amortized cost | 270,547 |  |
Gross Unrealized Losses | (1,966) |  |
Fair Value | 268,581 |  |
U.S. Government agencies |  |  |
investment securities held-to-maturity |  |  |
Amortized cost | 197,259 |  | 112,913
Gross Unrealized Losses | (12,318) |  | (2,627)
Fair Value | 184,941 |  | 110,286
Investment securities available for sale |  |  |
Amortized cost | 190,899 |  | 98,882
Gross Unrealized Losses | (10,957) |  | (1,765)
Fair Value | 179,942 |  | 97,117
Residential mortgage-backed securities issued by U.S. government agencies or sponsored enterprises |  |  |
investment securities held-to-maturity |  |  |
Amortized cost | 1,740,217 |  | 1,120,104
Gross Unrealized Gains |  |  | 14
Gross Unrealized Losses | (125,037) |  | (24,278)
Fair Value | 1,615,180 |  | 1,095,840
Investment securities available for sale |  |  |
Amortized cost | 2,156,635 |  | 1,851,700
Gross Unrealized Gains | 48 |  | 5,324
Gross Unrealized Losses | (142,779) |  | (25,985)
Fair Value | 2,013,904 |  | 1,831,039
Residential collateralized mortgage-obligations issued by U.S. government agencies or sponsored enterprises |  |  |
investment securities held-to-maturity |  |  |
Amortized cost | 455,180 |  | 174,178
Gross Unrealized Losses | (24,951) |  | (4,937)
Fair Value | 430,229 |  | 169,241
Investment securities available for sale |  |  |
Amortized cost | 739,068 |  | 730,949
Gross Unrealized Gains | 167 |  | 5,957
Gross Unrealized Losses | (44,530) |  | (10,911)
Fair Value | 694,705 |  | 725,995
Commercial mortgage-backed securities issued by U.S. government agencies or sponsored enterprises |  |  |
investment securities held-to-maturity |  |  |
Amortized cost | 373,100 |  | 350,116
Gross Unrealized Gains | 108 |  | 304
Gross Unrealized Losses | (28,673) |  | (8,021)
Fair Value | 344,535 |  | 342,399
Investment securities available for sale |  |  |
Amortized cost | 1,247,034 |  | 1,220,233
Gross Unrealized Gains | 301 |  | 5,438
Gross Unrealized Losses | (95,475) |  | (18,430)
Fair Value | 1,151,860 |  | 1,207,241
State and municipal obligations |  |  |
Investment securities available for sale |  |  |
Amortized cost | 1,201,639 |  | 798,211
Gross Unrealized Gains | 1,884 |  | 16,697
Gross Unrealized Losses | (75,826) |  | (2,219)
Fair Value | 1,127,697 |  | 812,689
Small Business Administration loan-backed securities |  |  |
investment securities held-to-maturity |  |  |
Amortized cost | 62,013 |  | 62,590
Gross Unrealized Losses | (6,403) |  | (2,292)
Fair Value | 55,610 |  | 60,298
Investment securities available for sale |  |  |
Amortized cost | 477,702 |  | 502,812
Gross Unrealized Gains | 551 |  | 2,330
Gross Unrealized Losses | (20,896) |  | (4,479)
Fair Value | 457,357 |  | 500,663
Corporate securities. |  |  |
Investment securities available for sale |  |  |
Amortized cost | 30,619 |  | 18,509
Gross Unrealized Gains | 34 |  | 234
Gross Unrealized Losses | (493) |  | (9)
Fair Value | $ 30,160 |  | $ 18,734

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